Step 1: Log in to cPanel
Open your cPanel account using your login credentials.
Step 2: Navigate to MIME Types
In the Advanced section, click on MIME Types.

Step 3: Add a New MIME Type
In the “Create a MIME Type” section:

MIME Type: Enter the appropriate MIME type (e.g., application/pdf for PDFs).
Extension(s): Enter the file extension (e.g., .pdf).
Click Add to save the changes
Step 4: Verify the MIME Type

After adding, you will see the newly created MIME type listed under “User Defined MIME Types”.